125722541 has 4 divisors (see below), whose sum is σ = 143682912. Its totient is φ = 107762172.

The previous prime is 125722529. The next prime is 125722543. The reversal of 125722541 is 145227521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145227521 = 2243 ⋅64747.

It is not a de Polignac number, because 125722541 - 2¹⁰ = 125721517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125722543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8980175 + ... + 8980188.

It is an arithmetic number, because the mean of its divisors is an integer number (35920728).

Almost surely, 2^125722541 is an apocalyptic number.

It is an amenable number.

125722541 is a deficient number, since it is larger than the sum of its proper divisors (17960371).

125722541 is an equidigital number, since it uses as much as digits as its factorization.

125722541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17960370.

The product of its digits is 5600, while the sum is 29.

The square root of 125722541 is about 11212.6063428625. The cubic root of 125722541 is about 500.9615377052.

The spelling of 125722541 in words is "one hundred twenty-five million, seven hundred twenty-two thousand, five hundred forty-one".